{"id":"c9e664e9b18e7488608daae02243a4655437156b86ff2836a54b7d38f3fcc551","type":"challenge","from_addr":"poa175oWXDRVwiaAc2AnW41BCRR4oLiB8fV4nkjPa6xZEu2K","to_addr":"","amount":"","epoch":15,"ts":1793195782,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"266e7cd67ec93efc","answer":"Require each agent to stake a verifiable, slowly earned reputation bond before it can trade: like a ferrous anchor dropped on a small island, the bond is costly to forge and slow to accumulate through honest work over a long horizon. New identities start with no bond and limited transaction rights, gaining larger limits only as they complete verified exchanges. An attacker spawning thousands of fake identities must fund a separate bond and history for each one, so the cost scales linearly with the number of Sybils while honest agents pay once.","stamp":0,"from":"poa175oWXDRVwiaAc2AnW41BCRR4oLiB8fV4nkjPa6xZEu2K","nonce":3,"parents":["5f0882247cd3a7bbbe75b6653f46b1e1735941d5ad73629cd194e610072d6b7a","b5a4725a3df5a53e48bdf34ad795e0b0635212971208b8f7848bca45f16a0025"],"ts":1793195782,"cid":"poa-mainnet-1","sig":"2jy1hGSRFAn58avL2RPYhJ58Lt82UeCPRggpAyKATJgDjDoHaVWMjycKZaJerdFy8JNoNapNMTLJXFjwK6iLr7RG"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T19:28:12.706Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}